Is there any root motion workflow that doesn't require feet adjustments on frame by frame basis?
So a guy on Blender Artists gave a suggestion that worked in my first test. Create 2 auxiliary bones and link them on each foot using the copy transform modifier, this makes the feet follow these auxiliary bones instead of the root, overwriting the original parenting of the armature for the animations, while keeps the original parenting scheme in place for exporting.
If anyone need more details on this method, the complete answer can be checked at:
https://blenderartists.org/t/is-there-any-root-motion-workflow-that-doesnt-require-feet-adjustments-on-frame-by-frame-basis/1247260